The Return of the King, LoTR Appendix A, Annals of the Kings and Rulers: Eriador, Arnor, and the Heirs of Isildur: The North-kingdom and the Dúnedain

'I wonder who made this path, and what for,' said Merry, as they walked along one of these avenues, where the stones were unusually large and closely set. ...

[Answered] Strider[,] 'The Men of the West did not live here; though in their latter days they defended the hills for a while against the evil that came out of Angmar. This path was made to serve the forts along the walls.'

The Fellowship of the Ring, LoTR Book 1, Ch 11, A Knife in the Dark

A great host came out of Angmar in 1409, and crossing the river entered Cardolan and surrounded Weathertop. The Dúnedain were defeated....

The Return of the King, LoTR Appendix A, Annals of the Kings and Rulers: Eriador, Arnor, and the Heirs of Isildur: The North-kingdom and the Dúnedain